Thresher-tooth.



PATENTED MAY 30, 1905.

A. K. ALGEO.

THRESHER TOOTH.

APPLIOATION FILED JAN. 12, 1905.

M M a w Z 7 M 7 A A w UNITED STATES Patented May 30, 1905.

ALEXANDER K. ALGEO, OF ALGEO, NORTH DAKOTA.

THRESHEFl-TOOTH.

SPECIFICATION forming part of Letters Patent N 0. 791,122, dated May 30, 1905.

Application filed January 12, 1905. Serial No. 240,799.

To all whom it may concern.-

Be it known that I, ALEXANDER K. ALGEo,a citizen of the United States, residing at Algeo, in the county of Barnes and State of North Dakota, have invented certain new and useful Improvements in Thresher-Teeth; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in teeth for the cylinders and concaves or toothbars of threshing-machines; and it consists in certain novel features of construction, combination, and arrangement of parts hereinafter described and claimed.

The object of my invention is to improve and simplify the construction of teeth of this character, and thereby render the same more durable in use and more effective in operation.

The above and other objects, which will appear as the nature of my invention is better understood, are accomplished by the construction illustrated in the accompanying drawings, in which- I Figure 1 is a side elevation of the threshertooth embodying my invention. Fig. 2 is a front end view of the same. Fig. 3 is a rear edge view. Fig. 4 is a view of the outer end of the tooth, and Fig. 5 is a transverse sectional view taken on the line 5 5 of Fig; 1.,

Referring to the drawings by numerals, 1

denotes my improved tooth for use upon either" the cylinders or the concaves or tooth-bars of threshing-machines. The tooth comprises a body portion 3 and an attaching shank or stem 4:, which is formed at one end of the body portion and which may be of any desired construction. The body portion 3 is substantially V-shaped in form, its outer or free end 5 being much larger than its inner end 6, which is substantially square in cross-section. The front and rear edges 7 and 8 0f the body of the tooth converge toward veach other and at the same time are curved, as shown, the forward edge 7 being concaved longitudinally and the rear edge 8 convex. The body portion 4: of the tooth is also of concavo-concave form in longitudinal section, as seen in Figs. 2

8 of the tooth. This construction both strengthens and increases the durability of the tooth; but in order to lessen the wear upon the front edge 7 and the outer end 5 of the tooth I provide in the same a facing 11, of steel or other hard metal. While this facing may be formed upon or attached to the tooth in any desired manner, I preferably construct the same by casting in the body portion of the tooth a steel plate 12. This plate, as shown, conforms in shape to the body portion 3 of the tooth, its forward edge being curved or concaved and its side faces being concave. The thickness of the plate 12 is of course less than that of the body portion of the tooth, and it may be of any desired width, so as to project to a greater or less extent into the said body portion 3. As shown the outer end 13 of the'plate is heavier than its inner end 14 and does not'project as far beyond the front edge 7 of the tooth as does its inner end.

The construction, use, and advantages of my invention will be readily understood from i the foregoing description, taken in connection with the accompanying drawings, and it will be seen that by shaping the tooth as shown and by providing the steel plate 12 the tooth is not only strengthened, but also rendered much more durable, so that its life is materially prolonged.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

. 1. A thresher-tooth, having a longitudinally-eoneaved front edge, and a longitudiof harder material than the tooth and being 10 nally-concaved plate, of harder material than set in the front side thereof.

the tooth, set in and projecting in front of In testimony whereof I have hereunto set the front edge of the tooth. my hand in presence of tWo subscribing wit- 5 2. A thresher-to0th, having concave sides, nesses. Y

a concave front edge, and being widened to- ALEXANDER K. ALGEO.

Ward its outer end and provided in its front Witnesses:

side with a plate having eorrespondingly- E. J. MoMAnoN,

shaped sides and front edge, said plate being G150. A. WARREN. 

